Improvement in japanning metals



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GEORGE J. STURDY AND S. W. YOUNG, OF PROVIDENCE, RHODE ISLAND.

Letters Patent No. 80,236, dated July 21, 1868.

IMPROVEMENT IN JAPANNING METALS.

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TO ALL TO WHOM IT MAY CONCERN:

Be it known that we, Gnoner: J. STURDY and S. W. YOUNG, of Providence,in the county of Providence, and Stateof Rhode Island, have invented anew and useful Improvement inJapanning Metals; and we do hereby declarethat the following is a. full, clear, and exact description thereof,which will enable those skilled in the art to make and use the same,reference being had to the accompanying drawings, forming part of thisspecification.

This invent-ion relates to improvements in japanning, and is applicableto all metals and to all articles which have usually been heretoforesubjected to the japanning process, but more especially to the smallerand more delicate class of articles, as eyelets, hooks and eyes,buttons, &c., where the obstacles and objections to the presentimperfect method of japanning are more frequently met with. p p

In japanning eyelets by the old method, it has been found utterlyimpossible to perform the operation without leaving a surplus of thejapan adhering -to the articles.

This renders thcitn liable to stick together, and requires a tediousoperation to separate them, generally requiring hand-labor and muchmanipulation to prepare them for market or use.

At best there is left a thick, black, and uneven coating on the surface,which gives them a clumsy appearance.

But this is not the principal objection to them. I

These eyelets are used mainly in the shoe-trade, and are set bymachinery.

The surplus japan gums up the dies and machinery employed in theoperation, and thereby occasions much trouble and delay.

To overcome these diiiiculties, and to give the eyelets a better color,and much neater appearance, and to perform the process of japanningeyelets, as well as other articles, at far less expense, is the objectof our present invention.

This we accomplish, not only by the use of new and important additionsto the materials ordinarily used in jar-panning, but by pursuing a newand improved method iu'performing the operation.

Our invention consists.

Firstly, in covering the eyelet or article to be japanned with a coatingof plnmbago or black lead, or other equivalent substance. This we do byagitating or revolving the article (in mass) in the rattling-box, incombination with the powdered plumbago or black lead.

Secondly, we immerse the article in a solution" of asphaltum, japan, andnaphtha, or turpentine, or any equivalent volatile substance. Thisisdone with the article and solution in a cold state, but if thetemperature of the solution were raised, asimilar result might beproduced. We do not, therefore, confine ourselves to a cold temperaturefor this part of the process. The article is then taken from thesolution-and drained.

Thirdly, the article is next immersed in water, and the temperature israised suillciently to vaporize the naphtha or other volatile liquidwhich may be in combination with the japan-coating, and to separate fromthe article all the extra or surplus japanflnhich will readily floatupon the surface of the water.

The article is then turned out in mass into wire or perforated pans, andsubjected to a temperature of from 200 to 600 Fahrenheit, a suflicicntlength of time, when the process is complete.

The process may be repeated if deemed necessary, but in ordinary casesone operation is suiiicicnt.

The article, when 'thus japanned, is of the color of rubber or bronze,and presents a bright and neat appcarancc, free from all surplus japan,perfectly dry, and without any more tendency to stick together than ithad before the operation commenced.

Aside from the great superiority of the article we produce, we greatlyreduce the expense ofjapanning by our process.

We claim as new, and desire to secure by Letters Patent- 1. The use ofplumbago, or its equivalent, in the process of japanning, substantiallyas described.

2. immersing the article japanned in a water-bath, there by settingfreethe naphtha, or other volatile liquid,

and throwing off the excess of japan, substantially as described, andfor the purposes set forth.

3. The blzick-lead'coating, or its eqtivalerit, in combination with ahot-water bath, in the process ofjapam ning, substantially as describedfl GEORGE J. STURDY, s. W. YOUNG. Witnesses:

HENRY MARTIN, Tnos. A. MILLETT. v

